Q: What are the prime factors of the number 221,310,464?

 A: 2, 571, 757

Why are those the prime factors of the number 221,310,464?

Prime factors are the prime numbers that can be multipled together to equal the original number. You find the factors by dividing by prime numbers. It is best shown by creating a Factor Tree.

Factor Tree for the number 221,310,464

221,310,464
Factor Arrows
2110,655,232
Factor Arrows
255,327,616
Factor Arrows
227,663,808
Factor Arrows
213,831,904
Factor Arrows
26,915,952
Factor Arrows
23,457,976
Factor Arrows
21,728,988
Factor Arrows
2864,494
Factor Arrows
2432,247
Factor Arrows
571757

The numbers in bold above are the prime factors. If there are multiples, you only count them one time. This leads us to our prime factors of:

2, 571, 757

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 2 x 2 x 2 x 2 x 571 x 757 = 221,310,464

This can also be written as 29 x 5711 x 7571 = 221,310,464

If you would like to know more, or need additional explanation, please review our prime factorization explanation.


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